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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $483,130,771 | 47,466,245 | 47,466,245 |
| 2006 | $480,818,466 | 47,239,067 | 47,239,067 |
| 2007 | $428,646,819 | 46,709,816 | 46,709,816 |
| 2008 | $347,853,019 | 33,844,284 | 33,844,284 |
| 2009 | $239,113,187 | 21,033,086 | 21,033,086 |
| 2010 | $315,909,269 | 28,427,548 | 28,427,548 |
| 2011 | $310,808,281 | 26,994,845 | 26,994,845 |
Note: Quantity represents Weight in kilograms
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